diff --git a/DESCRIPTION b/DESCRIPTION
index 13f82df..9076b29 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -51,7 +51,7 @@ Suggests:
     tidyr,
     roxygen2,
     usethis,
-    testthat,
+    testthat (>= 3.0.0),
     rcmdcheck,
     httptest
 VignetteBuilder:
@@ -63,3 +63,4 @@ LazyData: true
 Remotes:
     hubverse-org/hubData
 BugReports: https://github.com/CDCgov/forecasttools/issues
+Config/testthat/edition: 3
diff --git a/tests/testthat.R b/tests/testthat.R
new file mode 100644
index 0000000..a328e6d
--- /dev/null
+++ b/tests/testthat.R
@@ -0,0 +1,12 @@
+# This file is part of the standard setup for testthat.
+# It is recommended that you do not modify it.
+#
+# Where should you do additional test configuration?
+# Learn more about the roles of various files in:
+# * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
+# * https://testthat.r-lib.org/articles/special-files.html
+
+library(testthat)
+library(forecasttools)
+
+test_check("forecasttools")
diff --git a/tests/testthat/test_epiweek_to_date.R b/tests/testthat/test_epiweek_to_date.R
index 83e0d3e..75970b9 100644
--- a/tests/testthat/test_epiweek_to_date.R
+++ b/tests/testthat/test_epiweek_to_date.R
@@ -4,13 +4,13 @@ schema <- tidyr::crossing(
   day_of_week = 1:7
 )
 
-testthat::test_that(paste0(
+test_that(paste0(
   "epiweek_to_date() function's internal ",
   "validation passes for USA epiweeks for ",
   "every epiweek in 1:52 for every epiyear ",
   "in 1800:2200, for every day of the epiweek"
 ), {
-  testthat::expect_no_error(
+  expect_no_error(
     with_usa_dates <- schema |>
       dplyr::mutate(
         date = forecasttools::epiweek_to_date(
@@ -24,13 +24,13 @@ testthat::test_that(paste0(
   )
 })
 
-testthat::test_that(paste0(
+test_that(paste0(
   "epiweek_to_date() function's internal ",
   "validation passes for ISO (epi)weeks for ",
   "every epiweek in 1:52 for every epiyear ",
   "in 1800:2200, for every day of the epiweek"
 ), {
-  testthat::expect_no_error(
+  expect_no_error(
     with_iso_dates <- schema |>
       dplyr::mutate(
         date = forecasttools::epiweek_to_date(
@@ -45,14 +45,14 @@ testthat::test_that(paste0(
 })
 
 
-testthat::test_that(paste0(
+test_that(paste0(
   "epiweek_to_date() function's internal ",
   "validation fails if you try to get the ",
   "start of an epiweek that doesn't exist ",
   "but passes if you get a valid epiweek"
 ), {
   ## 2020 had an epiweek 53
-  testthat::expect_no_error(
+  expect_no_error(
     forecasttools::epiweek_to_date(
       53,
       2020,
@@ -62,7 +62,7 @@ testthat::test_that(paste0(
   )
 
   ## 2021 did not
-  testthat::expect_error(
+  expect_error(
     forecasttools::epiweek_to_date(
       53,
       2021,
@@ -72,7 +72,7 @@ testthat::test_that(paste0(
   )
 
   ## a single failure should raise an error
-  testthat::expect_error(
+  expect_error(
     forecasttools::epiweek_to_date(
       53,
       c(2020, 2021),
@@ -83,7 +83,7 @@ testthat::test_that(paste0(
 
   ## but the validation should be vectorized
   ## and succeed accordingly
-  testthat::expect_no_error(
+  expect_no_error(
     forecasttools::epiweek_to_date(
       c(53, 52),
       c(2020, 2021),
diff --git a/tests/testthat/test_inferencedata_dataframe_to_tidydraws.R b/tests/testthat/test_inferencedata_dataframe_to_tidydraws.R
index def21b5..8a78b9e 100644
--- a/tests/testthat/test_inferencedata_dataframe_to_tidydraws.R
+++ b/tests/testthat/test_inferencedata_dataframe_to_tidydraws.R
@@ -1,11 +1,11 @@
-testthat::test_that("inferencedata_to_tidy_draws converts data correctly", {
+test_that("inferencedata_to_tidy_draws converts data correctly", {
   data("ex_inferencedata_dataframe")
   result <- inferencedata_to_tidy_draws(ex_inferencedata_dataframe)
 
-  testthat::expect_setequal(colnames(result), c("group", "data"))
-  testthat::expect_setequal(result$group, c("posterior", "predictions"))
+  expect_setequal(colnames(result), c("group", "data"))
+  expect_setequal(result$group, c("posterior", "predictions"))
 
-  testthat::expect_equal(
+  expect_equal(
     colnames(result$data[[1]]),
     c(
       ".chain", ".iteration", ".draw", "a", "b[troll_shore]", "b[drawn]",
@@ -17,7 +17,7 @@ testthat::test_that("inferencedata_to_tidy_draws converts data correctly", {
     )
   )
 
-  testthat::expect_equal(
+  expect_equal(
     colnames(result$data[[2]]),
     c(
       ".chain", ".iteration", ".draw", "obs[woken]", "obs[awash]",
@@ -25,10 +25,10 @@ testthat::test_that("inferencedata_to_tidy_draws converts data correctly", {
     )
   )
 
-  testthat::expect_no_error(
+  expect_no_error(
     tidybayes::spread_draws(result$data[[1]], a, b[x], c[y, z])
   )
-  testthat::expect_no_error(
+  expect_no_error(
     tidybayes::spread_draws(result$data[[2]], obs[a])
   )
 })
diff --git a/tests/testthat/test_simple_bottom_up.R b/tests/testthat/test_simple_bottom_up.R
index 3162c46..ee0e022 100644
--- a/tests/testthat/test_simple_bottom_up.R
+++ b/tests/testthat/test_simple_bottom_up.R
@@ -32,8 +32,8 @@ test_u_mat <- matrix(c(0.1, 0.3, 0.7), nrow = 1)
 location_names <- c("A", "B", "C")
 colnames(test_u_mat) <- location_names
 
-testthat::test_that("`validate_base_forecasts` throws an error", {
-  testthat::expect_error(validate_base_forecasts(bad_test_base_forecasts,
+test_that("`validate_base_forecasts` throws an error", {
+  expect_error(validate_base_forecasts(bad_test_base_forecasts,
     test_cp,
     value_to_aggregate_col = "hosps",
     rank_quantity_col = "rank_quantity",
@@ -42,7 +42,7 @@ testthat::test_that("`validate_base_forecasts` throws an error", {
   ))
 })
 
-testthat::test_that("`count_trajectories` returns correct number of trajs", {
+test_that("`count_trajectories` returns correct number of trajs", {
   result <- count_trajectories(test_base_forecasts,
     location_col = "location",
     date_col = "date"
@@ -51,10 +51,10 @@ testthat::test_that("`count_trajectories` returns correct number of trajs", {
     location = c("A", "B", "C"),
     n_sample_trajs = c(2, 2, 2)
   )
-  testthat::expect_equal(result, expected_output)
+  expect_equal(result, expected_output)
 })
 
-testthat::test_that("`copula2tbl` returns the expected output", {
+test_that("`copula2tbl` returns the expected output", {
   i <- 1
   location_col <- "location"
 
@@ -65,10 +65,10 @@ testthat::test_that("`copula2tbl` returns the expected output", {
     location = location_names
   )
 
-  testthat::expect_equal(result, expected_output)
+  expect_equal(result, expected_output)
 })
 
-testthat::test_that("`rank_sampled_trajectories` returns correct rankings", {
+test_that("`rank_sampled_trajectories` returns correct rankings", {
   ranked_base_forecasts <-
     rank_sampled_trajectories(test_base_forecasts,
       location_col = "location",
@@ -83,10 +83,10 @@ testthat::test_that("`rank_sampled_trajectories` returns correct rankings", {
     rank = c(1, 2, 1, 2, 1, 2)
   )
 
-  testthat::expect_equal(ranked_base_forecasts, expected_rankings)
+  expect_equal(ranked_base_forecasts, expected_rankings)
 })
 
-testthat::test_that("sample_aggregated_trajectories", {
+test_that("sample_aggregated_trajectories", {
   i <- 1
   location_col <- "location"
   test_sample <- copula2tbl(
@@ -123,5 +123,5 @@ testthat::test_that("sample_aggregated_trajectories", {
     forecast = c(123, 200)
   )
 
-  testthat::expect_equal(result, expected_output)
+  expect_equal(result, expected_output)
 })
diff --git a/tests/testthat/test_to_hubverse.R b/tests/testthat/test_to_hubverse.R
index 0a11854..048b239 100644
--- a/tests/testthat/test_to_hubverse.R
+++ b/tests/testthat/test_to_hubverse.R
@@ -1,17 +1,17 @@
-testthat::test_that(
+test_that(
   paste0(
     "get_hubverse_table errors if reference date ",
     "is the wrong day of the week"
   ),
   {
-    testthat::expect_error(
+    expect_error(
       forecasttools::get_hubverse_table(
         tibble::tibble(),
         "2025-01-01"
       ),
       "which is day number 4"
     )
-    testthat::expect_error(
+    expect_error(
       forecasttools::get_hubverse_table(
         tibble::tibble(),
         "2025-01-01",
@@ -19,7 +19,7 @@ testthat::test_that(
       ),
       "which is day number 1"
     )
-    testthat::expect_error(
+    expect_error(
       forecasttools::get_hubverse_table(
         tibble::tibble(),
         "2025-01-01",